Anesthesia Toolbox Question:

A 68-year-old female is scheduled to undergo a laparoscopic cholecystectomy. She has claustrophobia and is unable to tolerate the full-face mask. You decide to use a nasal mask for induction. Regarding nasal masks, which of the following statements is true?

A. They have a decreased air leak compared to full face masks X

B. They are less irritating than nasal prongs ✔

C. They provide high flow oxygen X

Read the discussion and key information below.

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Discussion:

Nasal masks provide low flow oxygen through the nose. They are similar to full face masks in dyspnea rates, oxygenation and vital signs. They are a good alternative in patients with claustrophobia but have an increased air leak through the mouth.

Key Information:

Nasal masks are a good alternative for patients with claustrophobia or nasal irritation but have an increased air leak through the mouth.

References:

Kwok H, McCormack J, et al. Controlled trial of oronasal versus nasal mask in the treatment of acute respiratory failure. Critical Care Medicine. 2003; 31(2): 468-73.

Airway Podcast 2: High Flow Nasal Cannula, Apneic Oxygenation and Nasal Masks

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